/*******************************************************************************
 * Copyright 2010 Simon Mieth
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

package cn.kkdlk.parse.tools;

import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.XMLReaderFactory;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParserFactory;
import java.io.*;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

/**
 * @author <a href="mailto:simon.mieth@gmx.de">Simon Mieth</a>
 */
public class ConfigHelper {
    public static final String JAVA_15_SAX_DRIVER = "com.sun.org.apache.xerces.internal.parsers.SAXParser";

    public static String getSAXSDDriver() {
        String parser = JAVA_15_SAX_DRIVER;

        try {
            parser = SAXParserFactory.newInstance().newSAXParser()
                    .getXMLReader().getClass().getName();

            @SuppressWarnings("unused")
            XMLReader r = XMLReaderFactory.createXMLReader(parser);
        } catch (SAXException e) {
            e.printStackTrace();
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        }
        return parser;
    }

    public static Map<String, String> getProperties(ClassLoader cl, String resource) {
        Properties properties = new Properties();
        InputStream in = getConfigAsStream(cl, resource);
        if (in != null) {
            try {
                properties.load(in);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        Map<String, String> map = new HashMap<String, String>();
        for (Map.Entry<Object, Object> e : properties.entrySet()) {
            map.put(e.getKey().toString(), e.getValue().toString());
        }
        return map;

    }

    public static InputStream getConfigAsStream(ClassLoader cl, String resource) {

        File f = new File(resource);
        if (f.exists()) {
            try {

                return new FileInputStream(f);
            } catch (FileNotFoundException e) {

                e.printStackTrace();
            }
        } else {
            if (!resource.startsWith("/")) {
                resource = "/" + resource;
            }

            return cl.getResourceAsStream(resource);
        }
        return null;
    }
}
